Danger Will Robinson indeed!
So...
Immigration Issues
Work "other than flying"
Lack of PA-31 registration movement
Lack of PA-31s with ZK reg in the USA
Lack of PA-31s that aren't busy with other operators
Lack of claimed airline experience
Lack of logic in requirements
Large amounts of money changing hands.
If this company is humming 18 months from now with happy young pilots flying ZK registered Navajos around the Islands of Hawaii I shall eat all my hats.